Eophis

Eophis is an early genus of stem-snake (clade Ophidia)[1] containing one species, Eophis underwoodi, from the Middle Jurassic (Bathonian) from the Forest Marble Formation of United Kingdom. It is known from a fragmentary dentary from Kirtlington Quarry. It was previously interpreted as an anguimorph lizard. The placement of Eophis as a stem snake was re-affirmed by subsequent analyses.[2]

Eophis
Temporal range: Bathonian
↓
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Squamata
Clade: Ophidia
Genus: †Eophis
Caldwell et al. 2015
Type species
Eophis underwoodi
Caldwell et al. 2015

Phylogeny

Cladogram based in the phylogenetic analysis by Caldwell et al. (2015):[1]

Ophidia
 

Portugalophis

 
 

Parviraptor

 
 
 

Eophis

 
 
 

Unnamed sp.

 
 

Diablophis

 
 
 
 
 

Dinilysia

 
 
 

Madtsoiidae

 
 
 

Najash

 
 
 

Coniophis

 
 

Serpentes (Modern snakes)

 
 
 
 
 
 

See also

References
  1. Caldwell, M. W.; Nydam, R. L.; Palci, A.; Apesteguía, S. N. (2015). "The oldest known snakes from the Middle Jurassic-Lower Cretaceous provide insights on snake evolution". Nature Communications. 6: 5996. Bibcode:2015NatCo...6.5996C. doi:10.1038/ncomms6996. PMID 25625704.
  2. Harrington, Sean M.; Reeder, Tod W. (2017-02-18). "Phylogenetic inference and divergence dating of snakes using molecules, morphology and fossils: new insights into convergent evolution of feeding morphology and limb reduction". Biological Journal of the Linnean Society. 121 (2): 379–394. doi:10.1093/biolinnean/blw039. ISSN 0024-4066.


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